The MATMNXFLX or tavgM_2d_flx_Nx data product is the MERRA Data Assimilation System 2-Dimensional surface turbulence flux
diagnostic that is time averaged single-level at the native resolution. It is a history file that is produced from the GCM
during the corrector segment of the IAU cycle. All collections from this group are at reduced horizontal resolution. MERRA,
or the Modern Era Retrospective-analysis for Research and Application, is a NASA reanalysis for the satellite era (30 years
1979-current) using the Goddard Earth Observing System Data Assimilation System Version 5 (GEOS-5 DAS).
This data product contains 2-dimensional fields that do not vary during the reanalysis.
The data are on the GEOS-5 native 540 x 361 grid with 2/3° longitude x 1/2° latitude resolution. Data are archived in the
HDF-EOS (Grid) format, based on HDF4.